Vmac S700078 - Pressure Supply Valve Inspection; Valve Operation and Damage Check

VMAC – Vehicle Mounted Air Compressors
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2.4.8 Turn the compressor switch on the control panel to the ON
position.
2.4.9 Allow the system to pressurize.
2.4.10 Turn the compressor switch on the control panel to the OFF
position.
2.4.11 Shutdown the engine and wait 5 minutes, then open the
pressure supply valve to depressurize the system.
2.4.12 Check for oil leaks.
2.4.13 Repeat steps 2.4.3 through 2.4.13 until the oil level dipstick
shows the oil level in the oil/air separator tank is in the
operational range.
2.5 Check pressure supply valve
Follow all safety precautions.
2.5.1 Check that the ball valve rotates freely.
2.5.2 Visually inspect the ball valve for damage, cracks or damaged
threads.